This product is designed for precise conductivity measurement of proton exchange membranes and other solid electrolyte films in electrochemical research. Constructed from high-quality stainless steel and polyether ether ketone (PEEK), it offers excellent chemical resistance and mechanical stability for reliable testing. The device features upper and lower contact surfaces with diameters of φ10 mm and φ15 mm, respectively, accommodating standard membrane samples for impedance or four-probe measurements. It is commonly applied in fuel cell, electrolyzer, and ion-exchange membrane studies, where accurate ionic conductivity data is essential for evaluating material performance and optimizing device efficiency. The robust build ensures consistent contact pressure and minimizes parasitic impedance, supporting reproducible results in laboratory environments.